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тАО01-05-2010 11:35 PM
тАО01-05-2010 11:35 PM
"%EIA0,
Receive CRC validation failure, device now unusable", the link is shutdown and all network traffic stops. This happens on both ethernet ports and with multiple IP stacks. No CRC errors are logged in the LAN counters and the Ethernet connection works fine when plugged into any other device, including the ILO board. I have also verified that speed and duplex are being negotiated correctly. I'm hoping someone here can explain what is happening or, more importantly, knows a way to tell VMS to stop shutting down the port.
Solved! Go to Solution.
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тАО01-06-2010 02:21 AM
тАО01-06-2010 02:21 AM
Re: VMS keeps disabling the ethernet port
Purely Personal Opinion
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тАО01-06-2010 04:41 AM
тАО01-06-2010 04:41 AM
Re: VMS keeps disabling the ethernet port
Can you see the speed/duplex selected?
Maybe the TCP/IP stacks use Jumbo-Frames and that fails?
Hein
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тАО01-06-2010 06:15 AM
тАО01-06-2010 06:15 AM
Re: VMS keeps disabling the ethernet port
the most detailled information would be reported by LANCP SHOW DEV/INT EIA0
This error msg does not seem to have been publicly reported before, consider to ask HP what this msg is meant to indicate.
Did this interface work before on this RX2620 ?
Volker.
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тАО01-06-2010 08:16 AM
тАО01-06-2010 08:16 AM
Re: VMS keeps disabling the ethernet port
The connection is only running at 100mb and neither side has jumbo frames enabled. Both sides agree on speed and duplex.
I just obtained this system. The previous owner indicates he never ran an IP stack on it.
I will get a copy of the LANCP output and post it here.
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тАО01-06-2010 10:06 AM
тАО01-06-2010 10:06 AM
Re: VMS keeps disabling the ethernet port
here is an answer from an authoritive resource:
'What it means is that the driver is doing a validation of the first 50000 packets for that interface and the calculated CRC is different from the actual CRC. These are packets that passed device validation so no CRC errors are recorded for the device. The CRC error most likely was introduced on each packet during DMA to host memory. The driver is detecting undetected data corruption and turning off the device.
So the device should be replaced.'
IMHO this looks like a hardware problem, if we believe that the driver is coded correctly. This looks like an unusual problem.
Volker.
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тАО01-06-2010 11:05 AM
тАО01-06-2010 11:05 AM
Re: VMS keeps disabling the ethernet port
Jon
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тАО01-06-2010 11:27 AM
тАО01-06-2010 11:27 AM
Re: VMS keeps disabling the ethernet port
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тАО01-06-2010 04:11 PM
тАО01-06-2010 04:11 PM
SolutionThat doesn't mean things won't work as upper layers may be doing checksum calculations and discarding bad packets. Or the corrupted data is in some part of the packet that isn't critical.
As to why DECnet might work and TCP/IP doesn't - it could be the packet size. Or the data in the packet might induce a hardware failure for that packet and not another with a different data pattern. Or the contents of other packets might affect the hardware and cause a bad DMA operation. I'd guess you were just lucky.
As far as running all day long without issue, the test only runs for the first 50000 packets. You could increase this to do the calculation on every packet and see if some DECnet traffic induced the failure.
This check was put into the driver to detect failing AB290A cards and it has been working successfully for several years. I don't think there is a problem with the code.
If you are willing to accept undetected data corruption, you can disable the check using a device-specific function:
$ mc lancp set dev eia/dev=(func="RCRC",value=(low,high))
low,high is a 64 bit number of remaining CRC checks to do, so you could set it to zero and it would do no more checks. The default is value=(50000,0).
- Dick
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тАО01-07-2010 12:33 AM
тАО01-07-2010 12:33 AM
Re: VMS keeps disabling the ethernet port
as the CRC checking code in the driver seems to exist for a reason, you might not want to bet your data on 'luck'. If there is some data corruption in the DMA operation between the interface and host memory, all things are possible: caused by certain bit patterns, message length etc.
Volker.